RTP Control Protocol (RTCP) Extended Report (XR) Blocks for Synchronization Delay and Offset Metrics Reporting
draft-ietf-xrblock-rtcp-xr-synchronization-02

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Last updated 2013-01-31
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Network Working Group                                          H. Asaeda
Internet-Draft                                                      NICT
Intended status: Standards Track                                R. Huang
Expires: August 5, 2013                                            Q. Wu
                                                                  Huawei
                                                        February 1, 2013

      RTP Control Protocol (RTCP) Extended Report (XR) Blocks for
           Synchronization Delay and Offset Metrics Reporting
             draft-ietf-xrblock-rtcp-xr-synchronization-02

Abstract

   This document defines two RTP Control Protocol (RTCP) Extended Report
   (XR) Blocks that allow the reporting of synchronization delay and
   offset metrics for use in a range of RTP applications.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on August 5, 2013.

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   Copyright (c) 2013 IETF Trust and the persons identified as the
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Synchronization Delay and Offset Metrics Reporting
           Blocks . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.2.  RTCP and RTCP XR Reports . . . . . . . . . . . . . . . . .  3
     1.3.  Performance Metrics Framework  . . . . . . . . . . . . . .  3
     1.4.  Applicability  . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Standards Language . . . . . . . . . . . . . . . . . . . .  4
   3.  RTP Flows Initial Synchronization Delay Report Block . . . . .  5
     3.1.  Metric Block Structure . . . . . . . . . . . . . . . . . .  5
     3.2.  Definition of Fields in RTP Flow Initial
           Synchronization Delay Metrics Block  . . . . . . . . . . .  5
   4.  RTP Flows Synchronization Offset Metrics Block . . . . . . . .  6
     4.1.  Metric Block Structure . . . . . . . . . . . . . . . . . .  7
     4.2.  Definition of Fields in RTP Flow General
           Synchronization Offset Metrics Block . . . . . . . . . . .  7
   5.  SDP Signaling  . . . . . . . . . . . . . . . . . . . . . . . .  8
     5.1.  SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . .  8
     5.2.  Offer/Answer Usage . . . . . . . . . . . . . . . . . . . .  9
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 10
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 11
   Appendix A.  Change Log  . . . . . . . . . . . . . . . . . . . . . 11
     A.1.  draft-ietf-xrblock-rtcp-xr-syncronization-02 . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11

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1.  Introduction

1.1.  Synchronization Delay and Offset Metrics Reporting Blocks

   This draft defines two new block types to augment those defined in
   [RFC3611], for use in a range of RTP applications.

   The first new block type supports reporting of Initial
   Synchronization Delay to establish multimedia session.  Information
   is recorded about time difference between the start of RTP sessions
   and the time the RTP receiver acquires all components of RTP sessions
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